Hi list, I've just wrote a metronome in QT for pulseaudio : http://slist.lilotux.net/linux/qmetronome/index_en.html Basicaly, the following pactl commands are used : pactl upload-sample tick.wav tick Every x ms, pactl play-sample tick pactl remove-sample tick It works well if my PC is already playing a MP3. But if my PC is silent, the 3 first ticks don't look very accurate. Any hint ? Regards Stephane